User's Manual

User’s Manual to XCRF-502E Reader
Internal use.only. Any transmission is not
allowed without permission.
9
Fig. 4.3 Illustration of the Back Panel of XCRF-502E Reader
1 – RS-232 serial port, for exchanging data with upstream
computers or other equipments; Its pin numbers, signal names and
signal flow directions are shown in the table below, of which the pin
numbers are identical with the numbers marked on DB9 plug.
Pin number Signal name
Signal flow
direction
2 RXD Input
3 TXD Output
5 Gnd Grounding
9
+5V（1A）
External
power
2 – Control interfaces include I/O interfaces and Wiegand
interface; I/O interfaces include 2 optical coupler input interfaces and 4